ice hook
/ˈʌɪs hʊk/noun
1A hook which can be attached securely to ice (in modern use, frequently in Mountaineering ); specifically = ice anchor.
2A hook employed in securing and hoisting or dragging ice, especially for storage. Now chiefly historical.
3A type of boat hook used to push large floating sections of ice away from a ship. Compare ice pole. Now historical.
Origin
Late 17th century; earliest use found in Account of Several Late Voyages. From ice + hook.